The future returns of each securities cannot be correctly reflected by the securities data in the past, therefore the statistical techniques and the experts' judgement and experience are combined together to estimate the security returns in the future. In this paper, the returns of each...

Engineering achievements have improved the quality of human life, provided creature comforts, and expanded the human domain to unprecedented levels. When enjoying all these achievements, human beings are coming to realize that the more invasion of the nature, the more environmental problems....